1191842867 has 2 divisors, whose sum is σ = 1191842868. Its totient is φ = 1191842866.

The previous prime is 1191842837. The next prime is 1191842881. The reversal of 1191842867 is 7682481911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1191842867 - 2⁸ = 1191842611 is a prime.

It is not a weakly prime, because it can be changed into another prime (1191842807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595921433 + 595921434.

It is an arithmetic number, because the mean of its divisors is an integer number (595921434).

Almost surely, 2^1191842867 is an apocalyptic number.

1191842867 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191842867 is an equidigital number, since it uses as much as digits as its factorization.

1191842867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 47.

The square root of 1191842867 is about 34523.0773106918. The cubic root of 1191842867 is about 1060.2452461499.

The spelling of 1191842867 in words is "one billion, one hundred ninety-one million, eight hundred forty-two thousand, eight hundred sixty-seven".